620757667 has 4 divisors (see below), whose sum is σ = 620853336. Its totient is φ = 620662000.

The previous prime is 620757647. The next prime is 620757679. The reversal of 620757667 is 766757026.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 620757667 - 2¹⁹ = 620233379 is a prime.

It is a super-2 number, since 2×620757667² = 770680162278565778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620757637) 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, 37333 + ... + 51334.

It is an arithmetic number, because the mean of its divisors is an integer number (155213334).

Almost surely, 2^620757667 is an apocalyptic number.

620757667 is a deficient number, since it is larger than the sum of its proper divisors (95669).

620757667 is an equidigital number, since it uses as much as digits as its factorization.

620757667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95668.

The product of its (nonzero) digits is 740880, while the sum is 46.

The square root of 620757667 is about 24915.0088701570. The cubic root of 620757667 is about 853.0491032179.

The spelling of 620757667 in words is "six hundred twenty million, seven hundred fifty-seven thousand, six hundred sixty-seven".