69916725 has 18 divisors (see below), whose sum is σ = 125229026. Its totient is φ = 37288800.

The previous prime is 69916703. The next prime is 69916771. The reversal of 69916725 is 52761996.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 10404 + 69906321 = 102^2 + 8361^2 .

It is not a de Polignac number, because 69916725 - 2¹² = 69912629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 155146 + ... + 155595.

Almost surely, 2^69916725 is an apocalyptic number.

It is an amenable number.

69916725 is a deficient number, since it is larger than the sum of its proper divisors (55312301).

69916725 is a wasteful number, since it uses less digits than its factorization.

69916725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310757 (or 310749 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 69916725 is about 8361.6221512336. The cubic root of 69916725 is about 411.9650365435.

It can be divided in two parts, 699 and 16725, that added together give a square (17424 = 132²).

The spelling of 69916725 in words is "sixty-nine million, nine hundred sixteen thousand, seven hundred twenty-five".