3656678905 has 16 divisors (see below), whose sum is σ = 4796366400. Its totient is φ = 2654157760.

The previous prime is 3656678891. The next prime is 3656678951. The reversal of 3656678905 is 5098766563.

It is not a de Polignac number, because 3656678905 - 2¹¹ = 3656676857 is a prime.

It is a super-2 number, since 2×3656678905² = 26742601228543998050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37315 + ... + 93304.

It is an arithmetic number, because the mean of its divisors is an integer number (299772900).

Almost surely, 2^3656678905 is an apocalyptic number.

It is an amenable number.

3656678905 is a deficient number, since it is larger than the sum of its proper divisors (1139687495).

3656678905 is a wasteful number, since it uses less digits than its factorization.

3656678905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131144.

The product of its (nonzero) digits is 8164800, while the sum is 55.

The square root of 3656678905 is about 60470.4796160904. The cubic root of 3656678905 is about 1540.6202742539.

The spelling of 3656678905 in words is "three billion, six hundred fifty-six million, six hundred seventy-eight thousand, nine hundred five".