61651066 has 8 divisors (see below), whose sum is σ = 93430260. Its totient is φ = 30507648.

The previous prime is 61651049. The next prime is 61651069. The reversal of 61651066 is 66015616.

It can be written as a sum of positive squares in 2 ways, for example, as 61168041 + 483025 = 7821^2 + 695^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (61651069) 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, 158701 + ... + 159088.

Almost surely, 2^61651066 is an apocalyptic number.

61651066 is a deficient number, since it is larger than the sum of its proper divisors (31779194).

61651066 is a wasteful number, since it uses less digits than its factorization.

61651066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317888.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 61651066 is about 7851.8192796320. The cubic root of 61651066 is about 395.0452674714.

The spelling of 61651066 in words is "sixty-one million, six hundred fifty-one thousand, sixty-six".