7457220077 has 4 divisors (see below), whose sum is σ = 7461505116. Its totient is φ = 7452935040.

The previous prime is 7457220061. The next prime is 7457220101. The reversal of 7457220077 is 7700227547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7700227547 = 31 ⋅248394437.

It can be written as a sum of positive squares in 2 ways, for example, as 1973669476 + 5483550601 = 44426^2 + 74051^2 .

It is a cyclic number.

It is not a de Polignac number, because 7457220077 - 2⁴ = 7457220061 is a prime.

It is a super-2 number, since 2×7457220077² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7457220047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2139908 + ... + 2143389.

It is an arithmetic number, because the mean of its divisors is an integer number (1865376279).

Almost surely, 2^7457220077 is an apocalyptic number.

It is an amenable number.

7457220077 is a deficient number, since it is larger than the sum of its proper divisors (4285039).

7457220077 is a wasteful number, since it uses less digits than its factorization.

7457220077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4285038.

The product of its (nonzero) digits is 192080, while the sum is 41.

The square root of 7457220077 is about 86355.1971626491. The cubic root of 7457220077 is about 1953.7049943712.

It can be divided in two parts, 74572 and 20077, that added together give a palindrome (94649).

The spelling of 7457220077 in words is "seven billion, four hundred fifty-seven million, two hundred twenty thousand, seventy-seven".