74815669 has 4 divisors (see below), whose sum is σ = 74848396. Its totient is φ = 74782944.

The previous prime is 74815667. The next prime is 74815687. The reversal of 74815669 is 96651847.

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

It can be written as a sum of positive squares in 2 ways, for example, as 65124900 + 9690769 = 8070^2 + 3113^2 .

It is a cyclic number.

It is not a de Polignac number, because 74815669 - 2¹ = 74815667 is a prime.

It is a super-2 number, since 2×74815669² = 11194768655835122, which 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 (74815661) 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, 12654 + ... + 17599.

It is an arithmetic number, because the mean of its divisors is an integer number (18712099).

Almost surely, 2^74815669 is an apocalyptic number.

It is an amenable number.

74815669 is a deficient number, since it is larger than the sum of its proper divisors (32727).

74815669 is a wasteful number, since it uses less digits than its factorization.

74815669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32726.

The product of its digits is 362880, while the sum is 46.

The square root of 74815669 is about 8649.6051354961. The cubic root of 74815669 is about 421.3705585840.

It can be divided in two parts, 748156 and 69, that added together give a square (748225 = 865²).

The spelling of 74815669 in words is "seventy-four million, eight hundred fifteen thousand, six hundred sixty-nine".